Dovetailing-machine



(No Model E. TOTMAN.

DOVE'TAILING MAUHINE. No. 374,018. Patented Nov. 29, 1-887.

p UNITED STATES P TENT OFFICE.

EDSELL TOTMAN, OF LA GRANGE, ILLINOIS.

DOVETAILING-MACHINE.

, $PECIFICATION forming part of Letters Patent No. 374,018, dated November 29, 1887.

Application filed June 21, 1886. Serial No. 205,745. (No model.)

To all whom it may concern:

Be it known that I, EDsELL TOTMAN, of La Grange, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dovetailing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of ma chines employed for cutting longitudinal dovetailed grooves in boards or strips, the means herein described being more particularly intended for use in machines used in manufacturing whatis known as combined sheathing and lathing, or sheathingstripsgrooved upon one or both faces to afford a hold for plastering.

The invention consistin the matters hereinafter described, and pointed out in the ap-' pended claims.

In the accompanying drawings, illustrating my invention, Figure 1 is a side elevation of a device embodying my iuvention,shown as secured upon the frame of'aplaningunachine, and illustrating the belt-connection for driving the dovetailing device. Fig. 2 is a side elevation, upon an enlarged scale, of the dovetailing device shown in Fig. 1. Fig. 3 is a detail sectional view through the arbor or man drel of one of the saws and its support. Fig. 4 is a detail side elevation of acasting for supporting the saw-mandrels. Fig. 5 is a detail section of the same, taken upon lineoc'm, Fig. 4.

As illustrated in the said drawings, A is a bed or frame upon which the dovetailing devices are supported, said frame, as herein shown, being that of a planing matcher, or machine for making tongues and grooves, said dovetailing device beingconveniently attached upon the frame of the machine, so as to operate upon the strip to be dovetailed after the latter has been reduced to suitable shape by the operation of the machine.

B B are the grooving saws, arranged obliquely with reference to one another, with their lower parts in position to form opposite sides of a dovetailed groove, as clearly shown in Fig. 2, and in the manner common heretofore in machines of this class.

G C are the mandrels, to which the saws B B are respectively attached. Said mandrels, instead of being arranged to extend in opposite directions from the saws, as common heretofore, are located both at the same side of the saws, so that the belt-pulleys D D thereon are both brought to the same side of the machine.

E E E E are beariug boxes for the mandrels O 0, respectively, each mandrel being provided with two of said bearing-boxes, arranged near its ends, and secured to plates or castings F F, which latter are bolted to a casting, G, secured to the frame A and formed to sustain the castings F F and the mandrels supported thereby at opposite inclinations. The bearing boxes E E are secured to the plates F F by means permitting a bodily lateral adjustment of the shaft in a vertical plane, the said boxes being herein shown, Figs. 2 and 3, as secured to the castings F F, which rest upon the casting G, whereby the saw-arbors and their bearings may be adjusted in the man:

n'er above stated. This adj ustment of themandrel-beari'ngs is mainly for the purpose of ad justing the saws vertically to make deeper or shallower grooves. The said arbor-bearings are, however, as herein shown, made independently adjustable to enable the inclination of the slws to be changed to make the sides of the grooves more or less inclined, as desired.

In the particular construction herein illustrated the bearings E E are provided with fiat surfaces in contact with the plates F F, and said bearings are secured by a single bolt, 6, whereby the bearings may be turned upon their seats when the inclination of the mandrel is changed by changing the bodily positions of the bearings, as above described. The

seats upon the plates F F, against which the bearings E E rest, are shown in the drawings as made with raised parts or ribs f f, to form the bearing-surfaces; but this construction is obviously not essential.

The casting G, by which the plates F F are sustained, is formed or provided with opposite inclined seats or bearing-surfaces G G", adapted to receive and sustain theplates F F, respectively, as clearly shown in Figs. 2, 3, 4, and 5. The said plates FF are adjustablysecured upon the inclined seats G G by means "permitting a longitudinal adjustment of the said plates, whereby the relative position of the saws may be changed to produce grooves of greater or less width, as desired.

In the particular construction of the parts herein illustrated as one convenient form thereof the plates or castings F F are provided at their lower margins with laterallyexteuding flanges forming flat plates F F, adapted to rest upon the inclined seats G G of the casting G, said seats being preferably provided with rabbets g g g 9, receiving the edges of the plates F F and serving to hold the plates F F from displacement laterally. The attaching devices for securing the plates F F to the casting G, herein illustrated, eonsist of headed bolts H H, inserted through the flat plates F F of the castings F F and passing through slotsg fin the said casting G.

The casting G, provided with inclined seats G G as above described, may be made or formed in its other parts in any shape or man ner found desirable or convenient, and said casting may be secured to a machine frame or bed in any convenient manner, or in some cases it may be independently supported and itself form the frame of a dovetailing-inachine. As herein shown, the parts of the casting G upon which the seats G G are formed are connected by a vertical web, 9', and flanged webs are provided at the lateral margins of the casting to form bearing-faces which rest upon the top of the frame or table A.

Any suitable guide and feed devices may be used for the strips to be grooved, a supporting-plate, I, being herein shown for sustaining the strip in its passage beneath the saws, and a lateral guide, I, being provided for the outer edge of the strip. I have herein shown a top guide, I, as secured to the lateral guide 1, and extending over the top of the strip to hold the latter from rising, the guides I I being shown as secured to the supporting-plate I by a bolt, 2', passing through a slot in the guides I 1, whereby the latter may be adjusted toward and from the saws, as may be desired, for strips of different widths. The strip is, as herein illustrated, guided at its side opposite to the guide I by contact with the inner vertical face of the casting G.

An important and principal advantage gained by theloeation of both of the saw-mandrels upon one side of the machine is thatsaid mandrels inay,by this construction, be driven by a single driving-belt trained over the belt pulleys D D upon the mandrels and around suitable driving and guide pulleys. An improved construction in the driving devices is herein illustrated,in which J is a driving-pulley located at the end of the machine-frame A opposite to that at which the dovetailing devices are placed; K, an idler located between the pulley J and the said dovetailing devices, and L a belt which passes from the pulley J to thepulleyDoftheupwardly-inclinedsaw-mandrel, thence over the idler K, and from said idler over the pulley Dofthe downwardly-inclined saw-mandrel back tothe pulley J.

The belt-pulleys D and D, diivingpiilleys, and idlers will be relatively so located that the belt will remain upon the said pulleys notwithstanding the twist in the belt occasioned by the inclined position of the saw-niandrels. The latter are, as shown, preferably extended for some distance exterior to their outer bearings to enable the pulleys D and D to be adjusted thereon as found necessary to bring them in proper position with relation to the idler and drive-pulley.

I am aware that it has been proposed heretofore to drive two spindles arranged parallel with each other by means of a drive-pulley and an idler. I am not aware, however, that it has ever been proposed heretofore to employ in connection with two saw-mandrels arranged obliquely with reference to each other and belt-pulleys upon the mandrels an idler located between the pulleys upon the saw-mam drels and the drive-pulley with its axis parallel with that of the drive pulley. A construction of this kind is therefore herein set forth in the appended first claim as part of my invention.

I claim as my invention 1. In a dovetailing-machine, the combination, with two saws arranged obliquely with reference to each other, of mandrels for the saws located at the same side of the latter,beltpulleys upon the said mandrels, a drivepulley the axis of rotation of which is located in a plane parallel with planes passing through the axes of the saw-mandrels, an idler located between the pulleys upon the saw-mandrels and the said drive-pulley,the axis of said idler being parallel with that of the drlve-pulley,and a belt passing over the drive-pulley, the idler, and both mandrel-pulleys, substantially as described.

2. The eonibinatiomwith two saws arranged obliquely with reference to each other, of mandrels for the saws, both located at the same side of said saws, plates, as F F, provided with bearings for the mandrels, and a part or casting, as G, supporting said plates F F and provided with oppositely-inclined seats for the said plates F F, said plates being adjnstably secured upon the said seats, substantially as described.

3. The con'ibination, with two saws arranged obliquely with reference to each other, of mandrels for said saws, both located at the same side of the saws, plates, as F F, sustaining the mandrels, bearings, as E E, for the opposite ends of the mandrels, attached to the plates F Fand independently adjustable thcreon,a part or casting, as G,sustaining theplatcs F F,aud provided with two oppositely-inclined seals for the said plates, and means adjustably securing said plates to the said casting, substantially as described.

In testimony thatI claim the foregoing as my invention I affix my signature in presence of two witnesses.

EDSELL T O'lM AN.

\Vitnesses:

G. CLARENCE POOLE, CHARLES E. FIsHER. 

